Disconnect and lock out the breaker for the exhaust blower drive motor.
Unplug the cable to the damper actuator. Coil it up and place it next to the trailer goose neck.
Remove the damper actuator by removing the two pins that hold it in place. If the electrical cable to the actuator
has any clamps holding it in place, loosen these so that the cable can be removed.
Remove the exhaust stack.
Inspect the exhaust louver section before removing. If additional disassembly is
required it should be carried out on a bench.
Remove the exhaust louver control section.
Remove the two bolts holding a flange bearing. Repeat this for each of the flange bearings.
Remove the spring pins holding the fan outlet louver to the control arm. Slide the control arm out of the housing.
Repeat this for each of the louvers.
Clean all of the components.
Inspect the exhaust louver gaskets. Replace any damaged pieces.
Replace any bearings which do not turn smoothly or have damaged seals.
Inspect the four louver blades for damage. Repair or replace them as necessary.
Inspect the louver control arms. Check the spring pin hole for wear. Check the rod for straightness. Check the
operator linkage for wear. Repair or replace any damaged components.
The exhaust louver actuator should be inspected and tested by a qualified facility. Repair or replace as necessary.
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